Bead loosening tire tool



June 13, 1950 5.1:. sum-l 2,511,743

BEAD LQOSENING TIRE TOOL Filed March 13, 1946 2 Sheets-Sheetl INVENT OR.

fil anckardfl. 5210115 June 13, 1950 p. s rrH 4 2,511,743

HEAD LOOSENING TIRE TOOL Filed March 13, 1946 2 Sheets-Sheet 2 PatentedJune 13, 1950 u s-JAT 'Ihe'inventionrelates to 1. an object the"provision-of removal of tires from rims.

It is an object of the invention to provide a tool that may be actuatedto break one bead of a tire casing from a rim before the other bead isloosened.

It is a further object to provide a tool that may be actuated to firstbreak loose one bead and later to react against the rim while looseningthe remaining bead. 1

Further objects will appear from the following description when read inconnection with the accompanying drawings showing an illustrativeembodiment of the invention and wherein:

Figure 1 is a plan view;

Figure 2 is a side elevation;

Figure 3 is a detail central section on line 3-3 of Figure l, drawn toan enlarged scale; and

Figure 4 is a view similar to Figure 3 showing a different position ofthe parts.

As shown the device comprises a base member ID adapted to rest on theground while the tool is in use, and formed to project at I l to aposition such that a foot of the user may press on the base to preventsliding movement of the tool while the near bead of a tire is brokenloose from a rim [2.

Rising from the base l and shown as integral therewith is an arm l3upwardly and laterally terminating in a jaw l4.

To support and actuate a second jaw l5, there is shown an H-shapedmember l6 pivoted on a pin I! and pivotally supporting an arm l8 whichrigidly carries the jaw l5.

To move the arm 18 and jaw l toward the jaw M a hand lever is is shownpivoted at 20 between spaced lugs 2| rising from the base I0 and towhich lever the arm I8 is pivoted at 22. The arm I8 is shown asbifurcated to provide an eye at each side of the lever to receive thepivot pin 22.

The height of axis 20 above the base and the spacing of the axes 20 and22 are each substantially one-half of the length of the H member l6between its pivot points. It results that the movement of the jaw l5towards jaw M after contact of jaw [5 with the tire will be in asubstantiall straight line; for the reason that the tendency of jaw l5to move in an are about axis 26 will be countered by the arcuatemovement, at this time, of axis 22.

For a purpose to be described a tongue 23 is shown carried in anelongated opening or recess 25 in the pivot rod 26 in which the arm I8is pivoted. A shelf or shoulder 21 is shown in the recess-525': to srvas astopgfdf'the. endZdf the tongue? 'If1end"29 ornie'rongse ismadthicker than the end 28 thereof and the pivot of the tongue is nearerthe end 28 whereby, if the tongue is not manually controlled, the end29, shown as slightly beveled, will be depressed by gravity and willrest on the complemental bevel of the end of the recess 25 in theposition shown in Figures 2 and 3.

To adapt the device for use with tires of a range of diameters, theheight of the jaws above the upper surface of the base [0 is madesuflicient to receive the largest tires to be operated on.

In use the wheel is jacked up to raise the rim l2 to just clear the jawLand the device is placed under the tire. If then the hand lever ismoved, if there was no friction of the base [0 on the ground, and ifboth rims were free to leave the rim, the tire beads would move towardeach other an equal distance and the tool would move toward the operatorone-half the sum of the movements of the beads.

It is found to be more efilcient to wholly break one bead from the rimbefore starting to break the other. To this end the friction of thedevice on the ground is increased by placing a foot of the operator onthe end H of the base Ill. The friction of the base on the ground withthe probable adherence of the bead at the jaw M will cause the jaw IE toloosen its bead first. The jaws l4 and I 5 are shown arcuate in form tosubstantially conform to the curvature of the average rim. Therefore,the jaws l5 if moved to carry its bead substantially across the rim tothe fixed bead will loosen the first bead beyond the circumferentialextent of v its bead. By revolving the wheel between movements of thejaw IE to apply the same at possibly three positions the first bead willbe entirely loosened from the rim.

With the bead adjacent jaw l5 completely loosened the end 28 of tongue23 is held depressed to elevate the end 29 thereof into position toimpinge against the rim whereupon actuation of the hand lever will causethe jaw M to loosen its bead.

Minor changes may be made in the physical embodiment of the inventionwithin the scope of the appended claims without departing from thespirit of the invention.

I claim:

1. A tire tool comprising, in combination: a base member; an arm rigidwith said base member and projecting laterally therefrom; a jaw rigidwith said arm and overhanging said base member; a member pivoted on saidbase member in spaced relation to said arm; a second arm pivoted on saidpivoted member and terminating in a jaw opposed to said first named jaw;a tongue pivotally associated with said second named arm having a freeend normally extending substantially flush with the upper surface ofsaid last named jaw; means to manually move said tongue about its pivotto raise its free end above the surface of the jaw adjacent thereto toimpinge against, a tire rim; and-{lever means to cause relative movementbetween'said jaws;

2. A tire tool comprising,in combination: a

ground supported base member; an arm rigid with f of this patent:

r rs 2,511,743 :1;

said base member, rising therefromand termi-.

nating in a jaw rigid with the arm and over-' hanging the base member; apair rigidly connected arms, their lower end s spanning and pivoted tothe base member; a'pair of spaced lugs rigid with the base member andproject-;

ing thereabove; a hand lever pivoted at one end thereof between saidlugs; a movable jaw carryin arm pivoted betweenits ends to the :Number."1,066;210 I 1,392,591

.. REFERENCES CITED The following references are of record in the UNITEDSTATES PATENTS Name Date Burt Sept. 12, 1911 Mahon July 1, 1913 MobleyOct. 14, 1921 Saistrom, Dec. 19, 1922 (Davenport Apr. 21, 1942 Johnsoneta1 -L Apr. 6,1948

